Evaporating-pan.



PATBNTED APR. 2, 1907.

W. R. MA GKLIND. EVAPORATING PAN.

APPLICATION FILED JUNE 11,1906.

a sums-sum 1.

I I 1am 30 PATENTED APR. 2, 1907. W. R. MAOKLIND. EVAPORATING PAN.

APPLICATION FILED JUNE 11,1906.

Witnesses lnuenfior: William R. Maokind by MW m PATENTED APR. 2, 1907.

W. R. MAGKLIND.

EVAPORATING PAN.

APPLICATION FILED JUNE 11,1906.

5 SHEETS-SHEET L.

mm y w s. V w A .mM W w .m WMW Witnesses Z7MM v -PATENTED .APR. 2, 1907. W. R. MAOKLIND. EVAPORATING PAN. APPLIOATION FILED JUNE 11,1906.

5 SHEETS-SHEET 6.

mm A R M. m. WM M H b an WWW/N UNITE STAT ES PATENT onnron.

WILLIAM R. MAOKLIND, OF MINERAL POINT, MISSOURI.

EVAPORATlNG-PAN.

Specification of Letters Patent.

Patented April 2, 1907.

Application filed June 11,1906. Serial No. 321.179.

I bodying the features of my invention. Fig.

-the drum. Fig. 5 is a detail view,

2 is a rear elevation thereof. Fig. 3 is a transverse sectional view. Fig. 4 is an enlarged sectional view through the center of artly in section,.through one of the heads of t e drum. Fig. 6 is a detail perspective view showing the means for adjusting the scraping-blades. Fig.7 is an enlarged detail view, part1 yin section, of the vibrating table; and Fig. 8 is a sectional view on the line 8 8 of Fig. 7.

This invention relates to driers, and par-- ticularly to driers of the type shown in my prior United States patent, No. 789,984,

dated May 16, 1905.

The machine herein shown is designed particularly for drying ground or pulverized barytes mixed with a liquid; but it could also be used for drying other materials.

The driers which have heretofore been in use had no means or confining the steam or vapor which rose from the material being 0 erated on, so that the drier was usually cfbuded in steam and the room in which the drier" was located was usuallyfilled with steam. This was very objectionable, as the steam or vapor damaged the surrounding machinery, prevented the operator from clearly seeing the mechanism of the drier, and often proved: injurious to the operator. Moreover, the recondensing of the vapor would dampen the material which had been dried.

I One of the objects of my invention is to overcome the objectionable features above referred to, and to this end I have provided means for collecting and conveying away from the drier the steam or vapor which rises from the material that is being dried.

. thoroughly mixing and constantly agitating Another object is to provide means for the material that is being fed to the drying device, so that said material can be fed more uniformlyand will not settle or pack in the hopper in which it is contained in' case the drying device is stopped.

Another object is to provide novel means for feeding the material in a continuous sheet to a rotary drying-drum, preferably heated by steam, and also novel means for removing the dried material from said drum, and still another object of my invention is to provide novel means for conveying from' the interior of said drum the condensed steam and utilizing it to heat a coil which collects and dries any flakes of partially-dried material that might blister and gfall from the drum, as Well as creates a draft which assists in conveying away the vapor or steam which rises from the material being dried. Although the drum of the drier herein shown is preferably heated by steam, it should be understood that hot water might be used for this purpose, so that the terms conveying away the condensed steam and conveying away the water formed by the condensed steam should be construed broadly.

Referring to the drawings, which represent the preferred form of my mvention, 1 designates the base of a frame comprising stan ards 2, which support a cylindrical drum 3, upon which the material is dried. Carried by cross-braces 4, comprising part of theframe, is a hopper 5 for containing the material which is to be dried, and located beneath said ho per is a vibratin table 6, which'receives the material from t e hopper and feeds it to the rotating drying-drum. For collecting the steam or vapor which rises from the material as it is being dried and conveying it away to some point remote from the drier the drum is inclosed in a casing 7, connected to the frame and communicating with a flue 8, as shown in Fi 3. Preferably a blower 9 extends into sai flue to create a draft,'and

the rear side of the casing is provided with a door 10, which enables the interior of the casing to be inspected. The casing, which is preferably formed of sheet metal, extends the full length of the body portion of the drumand is of the shape shown in Fig. 3, an opening 11 being rovided in the front of the casing to enable t e material to fall onto the drum and also to receive the scraping devices which remove the material from the drum, the opposite ends of the drum extending outside of the side walls of the casing, which snugly fit the periphery of said drum. As the material is removed from the drum it drops to the bottom of the casingand is carried therefrom by a spiral c'onveyer 12. The drum 3, which consists of a hollow cylinder, is provided withhead-s 13 and 14, having trunnions 15 and 16, that are journaled in the standards 2, and said drum is heated by ceptacle l9, located within the head and mounted stationarily relatively thereto, said receptacle being clamped to the end of a pipe 20, which extends through the trunnion 16. The pipe 20 communicates with the interior of the receptacle 19, and the water therein is drawn through a pipe 21 to a coil 22, located inside of-the casing below the drum and at the rear'thereof, said coil having a dischargepipe 23, which leads to a trap. (N 0t shown) The heated coil collects and dries any flakes of partially-dried material that mi ht blister and fall from the drum, and the eat from said coil passing up the line 8 creates adraft which assists in conveying away the steam or vapor that rises from the material on the drum, said heat also aidin to dry the mate rial on the surface of the rum. The flakes of material which collect on the coil can be brushed therefrom down the inclined bottom 24 of the casing to the spiral conveyor, so that none of the material is lost.

The hopper 5, in which the material is placed, is substantially U-shaped, as shown in Fig. 3, and extends the full length of the body of the drum. In order that the mate rial in the hopper shall be perfectly smooth, so that it will flow evenly, the hopper is provided with a mixer consisting of a plurality of spiders 25, carried by a horizontally-extending shaft 26 and provided with rods 27, which extend the full length of the hopper parallel to the shaft. Said shaft extends through smiling-boxes 28 in the ends of the hopper and is preferably driven continu ously at a slow. s eed by means of a pulley 29 and belt, (not s own,) so that the material in the hopper will be constantly agitated and thorou lily mixed, so that it will flow evenly through the feeding-valves and also prevent it from settling or packing in the hopper in case the drying-drum should be stoppedfo'r an reason.

n the bottom of. the hopper are a plurality of discharge-openings 30, which are controlled by valves 31, carried by actuating-rods 32, and the material in the hopper passes through said openings into an auxiliary hopper 33, carried by the vibrating table 6. A.

rotary mixer similar to the one in the hopper j 5 and consisting of the shaft 34, spiders 35,

e tacos and rods 36 is mounted in this auxiliaryhopper, which is also provided with a dam 37, that extends above the inclined surface of the vibrating table, thereby causing the ma passes over a pulley 40 onthe shaft 41, havmg a drive-pulley l2. The vibrating table is provided with rearwardly-oiitending arms 43, which are pivotally mounted on the stationary rod 44, and has forwardly-projeating arms 45, which cooperate with cams 46 on a rotating shaft 47, whereby a vibratory, movement isimparted to said table.

. in order that the material may cover the drum in a complete and continuous sheet, the discharge end of the vibrating table is provided with il-shaped corrugations 48, as shown in Fig. 1, so that the material as it leaves said table will be divided into an equal number of small "streams of uniform size, which will flow together as soon as they touch the surface of the drum. The drum is rotated the direction of the arrow in Fig. 3 by means ofv a continuously-drivcn pinion 49, which meshes with a gear 50, formed on the head 13 of the drum. 7 I

For removing the dried material from the drum a novel form of scraping mechanism is provided,- which enables a very long drum to be used and insures the'rernoval of all the material therefrom. The driers which have heretofore been in use were usuall provided with one continuous scraping-blade extending the full length of the drum; but when a very long; drum was used it was iin ossible to keep the blade accurately ruljustec with respect to the periphery of the drum. My improved scraping mechanism overcomes this ohjectionable feature and consists of a row of SCIBLPIHg-dflildfi 51, spaced apart, and'a 366': end row of scrap1nglades 52, located at the rear of the blades 51 and staggered with re spect to said first row, so that all of the ins-- terial on the drum will be sure to he scraped therefrom. Said scra mg-blades mount' ed on individual bracirets 53, adjustably sc-' 'bearing on the outer end of'the blade to in sure a very accurate adjustment thereof. v

Having thus described my invention, what l claim as new, and desire to secure ters Patent, is

1. In a drier, a hollow rotat a; drum, means for supplying steam to the interior of by fishsaid drum, one end of said drum being enlarged to form a water-trap to receive the water formed by the condensed steam, a segenlarged portion of said drum above the horizpntal axis thereof, buckets fastened to the inside of the enlarged portion of the drum for ing it into said receptacle, and a dischargepipe extending through the axle on which.

l l l l 4. In a drier, a hopper for holding the ma terial to be dried, a heated drum for drying V said material, an inclined feed-table located mental-shaper'l receptacle located within the between said hopper and heated drum, a

, hopper at the upper edge of said table to receive the material from the supply-hopper, a i rotary mixer in the-table-hopper, and a dam taking the Water from said trap and emptyin said. hopper for causing the material to flow evenly over the surface of the table; substantially as described.

the drum rotates and connected at its inner end 'to the lower end of said segmental-j shaped receptacle; substantially as described. 2. A drier comprising a transversely-arranged rotating drum, a hopper for holding the material to be dried and provided in its bottom with discharge-openings, an inclined the reccptac e, means ior supplying steam to the interior of said drum to dry the material thereon, a casing surrounding the drum for i collecting the steam or vapor arising from 3 said material and conveying it away from the drum, a coil located in said casing below the drum, and means for conveying the water, formed by the condensed steam in said drum, to said coil for heating the same; substantially as described.

3. In a drier, a hopper for holding the material to be dried and provided with dis, charge-openings, a horizontally-disposed heated drum for drying said material arranged below the be per, a vibrating table located between the rum and hopper I or receiving the material from the hopper and feeding it to said heated drum, and. a rotary mixer mounted in said hopper; substantially as described.

5. In a drier, a heated device for drying material, a vibrating feed-table for sup lymg the material to said heated device, sai table being provided at its edge with corrugations which. cause the material to flow therefrom in a number of uniform streams; substantially as described. feed-table arranged between said hopper and E drum and provided at its upper end with a receptacle to receive the material as it leaves 3 mp e1, a rotary mixer mounted in said 6. In a drier, a horizontally-arranged heated drum for drying material, a hopper for holding the material to be dried, an inclined feed-table located between said hopper and drum and provided with a corrugated edge, means for vibrating said table, means for removing the dry material from said drum comprising a plurality of rows of blades extending the full length of the drum, the blades of one row being staggered with respect to the blades of theother row, a plurality of brackets adjustable horizontally toward and away from the drum, means for clamping the" blades to the brackets, and means for adjusting each blade vertically relatively to the bracket on which it is mounted; substantially as described.

In testimony whereof I hereunto allix my signature, in the presence of two witnesses, this 7th day of June, 1906.

WILLIAM R. MACKLIND.

Witnesses:

G. O. QUASEBARTH, W. W. STRooP. 

